Propagation Loss as Predicted by Modified Ray Theory.
Abstract
Modified ray theory predicts a frequency dependent distortion of the sound field which is obtained by ordinary ray theory. One qualitative consequence of this distortion is the introduction of a caustic in problems where ray theory predicts a shadow boundary. In order to test this approximate theory and determine the significance of such effects, a computer program has been developed which computes propagation loss for a variety of problems which, while simple, are pertinent to underwater sound propagation. The results of a numerical investigation of propagation loss vs. range are presented as a function of frequency, material properties, and boundary conditions (unbounded, pressure release surface, and rigid boundary). Comparisons are made with ray theory and available exact solutions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1972
- Accession Number
- AD0755459
Entities
People
- James A. Davis
Organizations
- Woods Hole Oceanographic Institution